| // Copyright 2015 The Chromium Authors |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef COMPONENTS_DOM_DISTILLER_CORE_DOM_DISTILLER_REQUEST_VIEW_BASE_H_ |
| #define COMPONENTS_DOM_DISTILLER_CORE_DOM_DISTILLER_REQUEST_VIEW_BASE_H_ |
| |
| #include <memory> |
| #include <sstream> |
| #include <string> |
| |
| #include "base/memory/raw_ptr.h" |
| #include "components/dom_distiller/core/distilled_page_prefs.h" |
| #include "components/dom_distiller/core/dom_distiller_service.h" |
| #include "components/dom_distiller/core/task_tracker.h" |
| |
| namespace dom_distiller { |
| |
| // Handles receiving data asynchronously for a specific entry, and passing |
| // it along to the data callback for the data source. Lifetime matches that of |
| // the current main frame's page in the Viewer instance. |
| class DomDistillerRequestViewBase : public ViewRequestDelegate, |
| public DistilledPagePrefs::Observer { |
| public: |
| explicit DomDistillerRequestViewBase( |
| DistilledPagePrefs* distilled_page_prefs); |
| ~DomDistillerRequestViewBase() override; |
| |
| // Flag this request as an error and send the error page template. |
| void FlagAsErrorPage(); |
| // Get if this viewer is in an error state. |
| bool IsErrorPage(); |
| |
| // ViewRequestDelegate implementation: |
| void OnArticleReady(const DistilledArticleProto* article_proto) override; |
| |
| void OnArticleUpdated(ArticleDistillationUpdate article_update) override; |
| |
| void TakeViewerHandle(std::unique_ptr<ViewerHandle> viewer_handle); |
| |
| protected: |
| // DistilledPagePrefs::Observer implementation: |
| void OnChangeTheme(mojom::Theme new_theme) override; |
| void OnChangeFontFamily(mojom::FontFamily new_font_family) override; |
| void OnChangeFontScaling(float scaling) override; |
| |
| // Sends JavaScript to the attached Viewer, buffering data if the viewer isn't |
| // ready. |
| virtual void SendJavaScript(const std::string& buffer) = 0; |
| |
| // Sends JavaScript common to normal and error pages. |
| void SendCommonJavaScript(); |
| |
| // The handle to the view request towards the DomDistillerService. It |
| // needs to be kept around to ensure the distillation request finishes. |
| std::unique_ptr<ViewerHandle> viewer_handle_; |
| |
| // Number of pages of the distilled article content that have been rendered by |
| // the viewer. |
| int page_count_; |
| |
| // Interface for accessing preferences for distilled pages. |
| raw_ptr<DistilledPagePrefs> distilled_page_prefs_; |
| |
| // Flag to tell this observer that the web contents are in an error state. |
| bool is_error_page_; |
| }; |
| |
| } // namespace dom_distiller |
| |
| #endif // COMPONENTS_DOM_DISTILLER_CORE_DOM_DISTILLER_REQUEST_VIEW_BASE_H_ |